Cabin of working machine and working machine having cabin

ABSTRACT

A cabin includes: a panel disposed on a side of an operator seat, the panel including: a plurality of cross members extending in a first direction; and a plurality of transverse members intersecting with the plurality of cross members each other and extending in a second direction; a glass panel disposed on a side of the panel; a window frame disposed on the glass panel; a window panel disposed on the window frame, the window panel being configured to move in the first direction or in the second direction; a projecting member disposed on a side of the window panel, the side being an identical side to the operator seat, the projecting member being configured to move together with the window panel; and a guide portion configured to accept insertion of the projecting member and to limit a moving distance of the window panel.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a Divisional application of U.S. applicationSer. No. 14/862,401 filed on Sep. 23, 2015, which claims priority under35 U.S.C. § 119 to Japanese Patent Application No. 2014-202387, filedSep. 30, 2014, to Japanese Patent Application No. 2014-202392, filedSep. 30, 2014, and to Japanese Patent Application No. 2014-202400, filedSep. 30, 2014. The contents of these applications are incorporatedherein by reference in their entireties.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a cabin of a working machine, theworking machine having the cabin, and a method for manufacturing thecabin, and especially relates to a cabin of a working machine such as askid steer loader, a track loader, and a compact track loader, theworking machine having the cabin, and a method for manufacturing thecabin.

Description of Related Art

A working machine normally includes a cabin, the working machine beingcalled a loader such as a Skid Steer Loader (SSL), a Track Loader (TL),and a Compact Track Loader (CTL). Japanese Unexamined Patent ApplicationPublication No. 2010-65436 discloses a side structure of a cabin. Theside structure is constituted of a side panel and a glass panel, theside panel having a lattice structure (being a grille) and being coveredwith the glass panel, that is so-called a double-plate structure. Thecabin including the side structure is known.

The lattice structure (the grille) is formed of: a plurality ofvertically extending strips; and a plurality of horizontally extendingstrips. The side panel of the cabin disclosed in Japanese UnexaminedPatent Application Publication No. 2010-65436 employs the latticestructure.

A working machine normally has an air conditioner (an air conditioningmachine) as disclosed, for example, in Japanese Unexamined PatentApplication Publication No. 2004-291695, the working machine including acabin mounted on a body of the working machine, the working machinebeing called a loader such as a Skid Steer Loader (SSL), a Track Loader(TL), and a Compact Track Loader (CTL). The air conditioner cools aninside of the cabin mounted on the body of the working machine. Theworking machine including the air conditioner is known.

The working machine disclosed in Japanese Unexamined Patent ApplicationPublication No. 2004-291695 includes an inlet member on a rear portionof a roof member constituting the cabin so that the inlet memberprotrudes backward, the inlet member having an external air inletserving as a duct for introducing the external air. The working machinedisposes a filter inside the inlet member having the external air inlet.

Japanese Unexamined Patent Application Publication No. 2011-207287discloses a cabin of a working machine.

The cabin includes an operator seat, a frame portion, a roof, and afront panel. The frame portion is disposed in front of the operator seatto form an opening for getting on and off the working machine. The roofis disposed above the operator seat. The front panel is capable of beingmoved between a first position and a second position, the first positionbeing a position for the front panel to close the opening, the secondposition being a position between the operator seat and the roof.

In the above-mentioned working machine, the front panel is provided witha latch on an upper portion of the front panel, and the frame portion isprovided with a first striker. The latch of the front panel can beengaged to the first striker of the frame portion when the front panelis moved to be set at the first position. And, the roof is provided witha second striker on a rear portion of the roof. The latch of the frontpanel can be engaged to the second striker of the roof when the frontpanel is moved to be set at the second position. The working machine isprovided with a lock member. The lock member is configured to catch acertain position of the front panel, the certain position being oppositeto the latch, thereby holding the front panel.

The lock member is provided on the front panel and is capable of freelymoving in a direction along a width of the front panel. The cabin isprovided with a hold member in a room of the cabin, the hold memberbeing engaged to the lock member to hold the front panel at the secondposition.

The lock member can be moved toward a right side or a left side of thecabin when the front panel is moved to be set at the second position,thereby being engaged to the hold member. The lock member iscontinuously pressed by a pressing member toward a direction in whichthe lock member is engaged to the hold member. In addition, the pressingmember continuously presses the lock member to the hole member after thelock member is engaged to the hold member once. When the lock memberengaged to the hold member is moved from the hold member against thepressing force of the pressing member, the lock member can slip out fromthe hold member.

BRIEF SUMMARY OF THE INVENTION Problems to be Solved by the Invention

In a manufacturing process of the side panel, the press forming molds aplate to form a lattice structure (form a grille plate) at first. Then,the grille plate is assembled on a frame body by the welding or by usingbolts, thereby being integrated with the frame body to form the sidepanel. However, the grille plate and the frame body are separatelyprepared and are is integrated with each other by the assembling. Theside panel accordingly has a limitation on improvement of precision andstrength even when the grille plate has adequate precision and the framebody has adequate precision.

To solve the above mentioned problems, the present invention intends toprovide: a cabin of a working machine, the cabin including a side panelfabricated with high precision and high strength; and a working machinehaving the cabin.

In addition, the above mentioned conventional duct (the external airinlet) is manufactured as a component formed separately from the cabin,and is additionally attached to the cabin. Thus, the cabin has problems,that is, the number of components is large and the number ofmanufacturing processes is large, for example.

To solve the above mentioned problems, the present invention intends toprovide: a cabin of a working machine, the cabin being capable of easilyforming the duct for introducing the external air; and a working machinehaving the cabin.

Furthermore, the lock member is continuously pressed by the pressingmember toward the direction in which the lock member is engaged to thehold member, and protrudes toward the direction along the width of thefront panel (here referred to as a side direction). The lock membermoves together with the front panel moving between the first positionand the second position. When the front panel moves between the firstposition and the second position together with the lock memberprotruding toward the side direction, the lock member will hit somethingarranged in the cabin.

To solve the above mentioned problems, the present invention intends toprovide: a cabin capable of preventing the hitting of the lock member;and a working machine having the cabin.

Means of Solving the Problems

To solve the above-mentioned technical problems, techniques that thepresent invention provides are characterized in the following points.

A cabin includes: a panel disposed on a side of an operator seat, thepanel including:

-   -   a plurality of cross members extending in a first direction;    -   a plurality of transverse members intersecting with the        plurality of cross members each other and extending in a second        direction; and    -   a frame member configured to connect between end portions of the        cross members and between end portions of the transverse        members;

a glass panel disposed on a side of the panel, the side being oppositeto the operator seat;

a window frame disposed on the glass panel;

a window panel disposed on the window frame, the window panel beingconfigured to move in the first direction or in the second direction;

a projecting member disposed on a side of the window panel, the sidebeing an identical side to the operator seat, the projecting memberbeing configured to move together with the window panel in the firstdirection or in the second direction; and

a guide portion configured to accept insertion of the projecting memberand to limit a moving distance of the window panel, the guide portionbeing constituted of the cross members and the transverse members.

The cabin includes: the window frame disposed on a side of the glasspanel, the side being an identical side to the operator seat;

the glass panel including:

-   -   a rim forming an opening in a front portion of the window frame,        and

the window panel closing the opening by moving forward in the windowframe, and opening the opening by moving backward in the window frame.

The cabin includes the guide portion disposed on a positioncorresponding to a rear portion of the panel.

The cabin includes: a frame member forming an entrance opening, theframe member being disposed in front of the operator seat; and

an operation member disposed on a corner portion between the panel andthe frame member forming the entrance opening.

A cabin includes: a panel disposed on a side of an operator seat, thepanel including:

-   -   a plurality of cross members extending in a first direction;    -   a plurality of transverse members intersecting with the        plurality of cross members each other and extending in a second        direction; and    -   a frame member configured to connect between end portions of the        cross members and between end portions of the transverse        members;

a glass panel disposed on a side of the panel, the side being oppositeto the operator seat;

a window frame disposed on the glass panel;

a window panel configured to move along the glass panel;

a projecting member disposed on a side of the window panel, the sidebeing an identical side to the operator seat, the projecting memberbeing configured to move together with the window panel; and

a guide portion configured to accept insertion of the projecting memberand to limit a moving distance of the window panel.

The cabin includes the window frame disposed on a side of the glasspanel, the side being an identical side to the operator seat. The glasspanel includes a rim forming an opening in a front portion of the windowframe. The window panel closes the opening by moving forward in thewindow frame and opens the opening by moving backward in the windowframe.

The cabin includes the guide portion disposed on a positioncorresponding to a rear portion of the panel.

A working machine includes: the cabin;

an operation device including: a boom configured to freely swing upwardand downward; and an operation tool supported on a front portion of theboom; and

a travel device.

A cabin includes:

a panel disposed on a side of an operator seat;

an outer peripheral portion disposed in the panel, the outer peripheralportion including:

-   -   a rim forming an opening;

a first plate portion facing the outer peripheral portion on a side ofthe panel, the side being an identical side to the operator seat,

a second plate portion connected to the first plate portion andconnected to the outer peripheral portion; and

a duct formed of the outer peripheral portion and the plate portion, theduct being communicated with the opening.

In the cabin, the outer peripheral portion includes an upper plateportion constituting an upper portion of the panel, and the rim disposedin the upper plate portion.

The cabin includes: a filter inserted to the rim; and a cover includinga plurality of louver portions each having an air inlet, the covercovering the filter.

The cabin includes a shield member disposed on a side of the louverportion, the side being opposite to the outer peripheral portion.

In the cabin, the shield member includes a plurality of plates extendingin a first direction and joint portions each jointing the plates.

In the cabin, the plates are disposed between the louver portions.

In the cabin, the shield member includes a fixation member configured tobe fixed to the cover.

A working machine includes the cabin, an operation device including: aboom configured to freely swing upward and downward; and an operationtool supported on a front portions of the boom; and a travel device.

The cabin includes the outer peripheral portion including: an upperplate portion constituting an upper portion of the panel, and the rimdisposed in the upper plate portion.

The cabin includes: a filter inserted to the rim; and

a cover including: a plurality of louver portions each having an airinlet, the cover covering the filter.

The cabin includes: a shield member disposed on a side of the louverportion, the side being opposite to the outer peripheral portion.

The cabin includes the shield member including: a plurality of platesextending in a first direction; joint portions each jointing the plates.

The cabin includes the plates disposed between the louver portions.

The cabin includes the shield member including: a fixation memberconfigured to be fixed to the cover.

A working machine includes: the cabin; an operation device including:

-   -   a boom configured to freely swing upward and downward; and    -   an operation tool supported on a front portions of the boom; and        a travel device.

A working machine includes: the cabin; a machine body configured tosupport the cabin; an operation device disposed on the machine body, theoperation device including: a right boom disposed on a right side of thecabin and being capable of freely swinging upward and downward; a leftboom disposed on a left side of the cabin and being capable of freelyswinging upward and downward; and an operation tool supported on frontportions of the right boom and the left boom; a right travel devicedisposed on a right side of the machine body; and a left travel devicedisposed on a left side of the machine body.

A cabin includes: an operator seat; a frame member forming an entranceopening, the frame member being disposed in front of the operator seat;a roof arranged above the operator seat; a first panel configured to becapable of being moved to a first position where the front panel closesthe entrance opening and to a second position between the operator seatand the roof; a lock member disposed on the first panel, the lock memberbeing configured to be freely movable; a holding member configured to beengaged to the lock member to hold the first panel at the secondposition; and a pressing member configured to press the lock membertoward a direction opposite to a direction of engaging to the holdingmember.

The cabin includes: a second panel disposed on a side of the operatorseat, wherein the holding member is disposed on an upper portion of thefront portion of the second panel.

The cabin includes: a support member configured to support the lockmember, the support member being disposed on the first panel; a firstreceiving portion disposed on the support member; and a second receivingportion disposed on the lock member, wherein the pressing member isdisposed between the first receiving portion and the second receivingportion.

The cabin includes: a first striker disposed on an upper portion of theframe member, the first striker projecting downward, wherein the firstpanel includes: a rim disposed on a portion corresponding to the firststriker at the first position; and a latch disposed on the rim, thelatch configured to be engaged to the first striker.

The cabin includes: a second striker configured to protrude forward andto be engaged to the latch at the second position, the second strikerbeing disposed behind the operator seat and under the roof.

A working machine includes: the cabin; a machine body configured tosupport the cabin; an operation device disposed on the machine body, theoperation device including: a right boom disposed on a right side of thecabin and being capable of freely swinging upward and downward; a leftboom disposed on a left side of the cabin and being capable of freelyswinging upward and downward; and an operation tool supported on frontportions of the right boom and the left boom; a right travel devicedisposed on a right side of the machine body; and a left travel devicedisposed on a left side of the machine body.

Effects of the Invention

A cabin of a working machine according to the present invention,comprises: an operator seat; and a panel disposed on a side of theoperator seat, the panel including: a plurality of cross membersextending along a front to rear direction and are disposed horizontallyat predetermined intervals; a plurality of transverse membersintersecting with the plurality of cross members each other and aredisposed vertically at predetermined intervals; a first reinforcementportion formed on at least one of the cross members or on at least oneof the transverse members; and a frame member configured to connectbetween end portions of the cross members and between end portions ofthe transverse members, the plurality of cross members and the pluralityof transverse members forming a grille. In this manner, stiffness of theside panel having the grille is improved by the first reinforcementportion.

Additionally, in a conventional side panel, a grille plate and a frameare assembled integrally after the grille plate and the frame areseparately manufactured. Meanwhile, in the present invention, a grilleand the frame member can be manufactured at the same time by the pressforming process, thereby further improving precision of the side panel.That is, the present invention can provide a side panel manufacturedwith high precision and high strength.

In addition, a cabin of a working machine according to the presentinvention, comprises: an operator seat; a panel disposed on a side ofthe operator seat; an outer peripheral portion disposed in the panel,the outer peripheral portion including: a rim forming an opening; afirst plate portion facing the outer peripheral portion, the first plateportion being disposed on a side opposite to the operator seat; a secondplate portion connected to the first plate portion at one end of thesecond plate portion and connected to the outer peripheral portion atthe other end of the second plate portion; and a duct formed of theouter peripheral portion, the first plate portion, and the second plateportion, the duct being communicated with the opening. In this manner, apart of the duct can be constituted of the outer peripheral portion ofthe side panel, the side panel constituting the cabin, and accordinglythe number of parts for forming the duct can be reduced and the numberof manufacturing processes also can be reduced.

Moreover, in a cabin of a working machine according to the presentinvention, a pressing member is configured to press the lock membertoward a direction opposite to a direction of the engagement to theholding member, and accordingly the first panel moves between the firstposition and the second position under a state the lock member ispressed backward from the holding member. In this manner, the lockmember can be prevented from hitting something disposed in the cabin inthe move of the first panel between the first position and the secondposition.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic perspective view of a cabin of a working machineaccording to an embodiment of the present invention;

FIG. 2 is an exploded perspective view of the cabin according to theembodiment:

FIG. 3 is a vertical cross-sectional view showing arrangements of a sidepanel, a glass panel, a window frame, and a window portion (a windowpanel) of the cabin according to the embodiment;

FIG. 4 is a perspective view of an outer side (an outer surface side) ofthe side panel according to the embodiment;

FIG. 5 is a perspective view of an inner side (an inner surface side) ofthe side panel according to the embodiment;

FIG. 6 is a perspective view of an outer side (an outer surface side) ofthe glass panel according to the embodiment;

FIG. 7 is a perspective view of an inner side (an inner surface side) ofthe glass panel according to the embodiment;

FIG. 8 is a view showing the inner side (the inner surface side) of theside panel where the window portion (the window panel) according to theembodiment is closed;

FIG. 9 is a view showing the inner side (the inner surface side) of theside panel where the window portion (the window panel) according to theembodiment is opened;

FIG. 10 is a front view of the cabin according to the embodiment;

FIG. 11 is a back view of a front panel of the cabin according to theembodiment;

FIG. 12 is a side cross-sectional view of the cabin according to theembodiment:

FIG. 13 is a plan view of a latch of the front panel according to theembodiment;

FIG. 14 is a perspective view of a lock device of and a roller of thefront panel according to the embodiment;

FIG. 15 is a back view of the lock device according to the embodiment;

FIG. 16 is an enlarged view of an upper back portion of a left side ofthe cabin according to the embodiment;

FIG. 17 is a view showing the upper back portion of the left side of thecabin according to the embodiment where a shield member is detached;

FIG. 18 is a view showing the upper back portion of the left side of thecabin according to the embodiment where a filter is detached;

FIG. 19 is a vertical cross-sectional view of a duct of the cabinaccording to the embodiment;

FIG. 20 is a horizontal cross-sectional view of the duct according tothe embodiment;

FIG. 21 is a side view of a working machine according to the embodiment;and

FIG. 22 is a front view of the working machine according to theembodiment.

DESCRIPTION OF THE EMBODIMENTS

Referring to drawings, an embodiment of the present invention will bedescribed below.

FIG. 21 is a side view of a working machine according to an embodimentof the present invention. FIG. 22 is a front view of the working machineaccording to the embodiment of the present invention. FIG. 21 and FIG.22 show a Skid Steer Loader (SSL) as an example of the working machineof the present invention. The working machine of the present inventionis not limited to the Skid Steer Loader (SSL), and can be other types ofthe working machine, for example, a Track Loader (TL), a Compact TrackLoader (CTL), and the like.

The skid steer loader 1 is the working machine according to theembodiment. The skid steer loader 1 includes a body 2 of the workingmachine (hereinafter referred to as a machine body 2), a cabin 3, anoperation device 4, and travel devices 5. The cabin 3 is mounted on themachine body 2. The operation device 4 is attached on the machine body2. The skid steer loader 1 includes two travel devices 5; one of thetravel devices 5 is provided on a right side of the machine body 2, andthe other one is provided on a left side of the machine body 2. A motor6 is mounted on a rear portion of the machine body 2. An operator seat 8is provided in the cabin 3. The motor 6 is an engine, an electric motor,and the like. The skid steer loader 1 according to the embodimentemploys a diesel engine. Hereinafter, in explanations of the embodimentof the present invention and in explanations of the modified examples ofthe embodiment, a forward direction (a direction shown by an arrowedline F in FIG. 21) corresponds to a front side of an operator seating onthe operator seat 8 of the skid steer loader 1, a backward direction (adirection shown by an arrowed line B in FIG. 21) corresponds to a backside of the operator, a leftward direction (a direction shown by anarrowed line L in FIG. 22) corresponds to a left side of the operator,and a rightward direction (a direction shown by an arrowed line R inFIG. 22) corresponds to a right side of the operator.

In addition, in explanations of the embodiment of the present inventionand in explanations of the modified examples of the embodiment, adirection from the front side shown by the arrowed line F toward theback side shown by the arrowed line B (or a direction from the back sideshown by the arrowed line B toward the front side shown by the arrowedline A) is referred to as a front to rear direction (or a rear to frontdirection), and a horizontal direction perpendicular to the front torear direction (or the rear to front direction) is a direction K along awidth of the machine body 2. The direction K along the width of themachine body 2 is hereinafter referred to as the machine width directionK. As shown in FIG. 22, in the following description, a direction from acenter portion of the machine body 2 toward the above mentioned rightside can be referred to as an outward direction. And, a direction fromthe center portion of the machine body 2 toward the above mentioned leftside can be also referred to as the outward direction. The outwarddirection is hereinafter referred to as a machine outward direction. Inother words, the machine outward direction corresponds to a directiondeparting from the center portion of the machine body 2 in the machinewidth direction K. A direction opposite to the machine outward directioncan be referred to as an inward direction. The inward direction ishereinafter referred to as a machine inward direction. In other words,the machine inward direction corresponds to a direction toward thecenter portion of the machine body 2 in the machine width direction K.

As shown in FIG. 21 and FIG. 22, the operation device 4 includes booms10, an operation tool 11, lift links 12, control links 13, boomcylinders 14, and bucket cylinders 15.

The operation device 4 includes two booms 10; one of the booms 10 isprovided on a right side of the cabin 3 (referred to as the right boom10) and is capable of freely swinging upward and downward, and the otherone is provided on a left side of the cabin 3 (referred to as the leftboom 10) and is capable of freely swinging upward and downward. Theoperation tool 11 is a bucket (hereinafter referred to as a bucket 11),for example. The bucket 11 is provided on tip portions (front endportions) of the booms 10 and is capable of freely swinging upward anddownward. The lift link 12 and the control link 13 support a baseportion (a rear portion) of the boom 10 so that the boom 10 is capableof freely swinging upward and downward. The boom cylinder 14 is capableof being stretched and shortened, thereby moving the boom 10 upward anddownward. The bucket cylinder 15 is capable of being stretched andshortened, thereby swinging the bucket 11.

The operation device 4 includes a joint pipe 7 having a deformed shape,that is, the joint pipe 7 being a deformed pipe. The joint pipe 7 isconnected to a front portion of the right boom 10 and to a front portionof the left boom 10 between the right boom 10 and the left boom 10,thereby jointing the right boom 10 and the left boom 10 with each other.The operation device 4 includes two lift links 12, two control links 13,and two boom cylinders 14. One of the lift links 12 (the right lift link12), one of the control links 13 (the right control link 13), and one ofthe boom cylinders 14 (the right boom cylinder 14) are provided on aright side of the machine body 2, corresponding to the right boom 10(also referred to as the corresponding boom 10). And, the other one ofthe lift links 12 (the left lift link 12), the other one of the controllinks 13 (the left control link 13), and the other one of the boomcylinders 14 (the left boom cylinder 14) are provided on a left side ofthe machine body 2, corresponding to the left boom 10 (also referred toas the corresponding boom 10).

The lift link 12 is vertically provided on a rear portion of the baseportion of the boom 10. The lift link 12 is supported at an upperportion of the lift link 12 by a pivot shaft 16 (a first pivot shaft) tobe capable of freely turning around a horizontal axis of the pivot shaft16, the lift link 12 being supported on the rear portion of the baseportion of the boom 10 by the pivot shaft 16. In addition, the lift link12 is supported at a lower portion of the lift link 12 by a pivot shaft17 (a second pivot shaft) to be capable of freely turning around ahorizontal axis of the pivot shaft 17, the lift link 12 being supportedon the rear portion of the machine body 2 by the pivot shaft 16. Thesecond pivot shaft 17 is disposed lower than the first pivot shaft 16.

The boom cylinder 14 is supported at an upper portion of the boomcylinder 14 by a pivot shaft 18 (a third pivot shaft) to be capable offreely turning around a horizontal axis of the pivot shaft 18. The thirdpivot shaft 18 is disposed on the base portion of the boom 10 in frontof the first pivot shaft 16. The boom cylinder 14 is supported at alower portion of the boom cylinder 14 by a pivot shaft 19 (a fourthpivot shaft) to be capable of freely turning around a horizontal axis ofthe pivot shaft 19. The fourth pivot shaft 19 is disposed on a lowerportion of the rear portion of the machine body 2, being lower than thethird pivot shaft 18.

The control link 13 is disposed in front of the lift link 12. One end ofthe control link 13 is supported by a pivot shaft 20 (a fifth pivotshaft) to be capable of freely turning around a horizontal axis of thepivot shaft 20. The fifth pivot shaft 20 is disposed on the machine body2. The other end of the control link 13 is supported by a pivot shaft 21(a sixth pivot shaft) to be capable of freely turning around ahorizontal axis of the pivot shaft 21. The sixth pivot shaft 21 isdisposed on the boom 10 in front of the second pivot shaft 17, beinghigher than the second pivot shaft 17.

Stretching and shortening of the boom cylinder 14 swing the boom 10upward and downward around the first pivot shafts 16, the boom 10 beingsupported on the base portion of the boom 10 by the lift link 12 and thecontrol link 13, thereby moving a tip portion of the boom 10 upward anddownward. The control link 13 is swung upward and downward around thefifth pivot shaft 20 by the swinging upward and downward of the boom 10.The lift link 12 is swung forward and backward around the second pivotshaft 17 by the swinging upward and downward of the control link 13.

An attachment body 23 is pivotally supported on the front portions (thetip portions) of the booms 10, The bucket 11 is attached to theattachment body 23 and is capable of being freely attached and detached.The attachment body 23 is supported on the front portions of the booms10 by a pivot pin 24, thereby being capable of freely turning about ahorizontal axis of the pivot pin 24. Not only the bucket 11, otheroperation tools can be attached to the attachment body 23. The followingattachments (spare attachments) are exemplified as the other operationtools; for example, a hydraulic crusher, a hydraulic breaker, an anglebroom, an earth auger, a pallet fork, a sweeper, a mower, a snow blower,and the like.

The bucket cylinder 15 is arranged on the front portion of the boom 10.The bucket cylinder 15 is pivotally supported on the boom 10 by a firstbucket cylinder pin 26 at an upper portion of the bucket cylinder 15,thereby being capable of freely turning about a horizontal axis of thefirst bucket cylinder pin 26. The bucket cylinder 15 is pivotallysupported on the attachment body 23 by a second bucket cylinder pin 27at a lower portion of the bucket cylinder 15, thereby being capable offreely turning about a horizontal axis of the second bucket cylinder pin27. Stretching and shortening of the bucket cylinder 15 swing the bucket11.

In the embodiment, both of the right travel device 5 and the left traveldevice 5 employ a wheeled travel device, the wheeled travel devicehaving a front wheel 5F and a rear wheel 5R. However, a crawler traveldevice (including a semi-crawler travel device) may be employed as thetravel device 5.

Next, a concrete configuration of the cabin 3 will be described below.

As shown in FIG. and FIG. 21, the cabin 3 includes an operator seat 8, aroof 30, panels 31, a panel 32, and a panel 33. The roof 30 is arrangedabove the operator seat 8. The panels 31 are arranged on sides (a rightside and a left side) of the operator seat 8 (hereinafter referred to asside panels 31). The panel 32 is arranged in front of the operator seat8 (hereinafter referred to as a front panel 32). The panel 33 isarranged in back of the operator seat 8 (hereinafter referred to as arear panel 33). In the explanation described below, a side facing adirection outward the cabin 3 may be referred to as an outer side, thatis, a side opposite to the operator seat 8 (a side opposite to theinside of the cabin 3), and a side facing a direction inward the cabin 3may be referred to as an inner side, that is, a side identical to theoperator seat 8 (a side identical to the inside of the cabin 3).

As shown in FIG. 2 and FIG. 3, a glass panel 34 is disposed on the sideopposite to the operator seat 8 (on the outer side) of the side panel31. In particular, the side panel 31 includes a concave portion 35, theconcave portion 35 being concaved toward the side identical to theoperator seat 8 (toward the inner side). The glass panel 34 is fitted tothe concave portions 35.

Then, concrete configurations of the side panel 31 and the glass panel34 will be described below.

The side panel 31 will be explained at first.

As shown FIG. 4 and FIG. 5, the side panel 31 includes a plurality ofcross members 36, a plurality of transverse members 37, and a framemember 38.

The plurality of cross members 36 extend along the front to reardirection (or the rear to front direction) and are disposed horizontallyat predetermined intervals. Each of the cross members 36 is formed to bea strip and extends horizontally across the frame member 38. Inparticular, each of the cross members 36 is connected to a front portionof the frame member 38 at a front end of the cross member 36, and isconnected to a rear portion of the frame member 38 at a rear end of thecross member 36. The plurality of transverse members 37 extend along avertical direction and are disposed vertically at predeterminedintervals. Each of the transverse members 37 is formed to be a strip andextends vertically across the frame member 38. In particular, each ofthe transverse members 37 is connected to an upper portion of the framemember 38 at an upper end of the transverse member 37, and is connectedto a lower portion of the frame member 38 at a lower end of thetransverse member 37. The plurality of cross members 36 intersect withthe plurality of transverse members 37 each other, thereby forming agrille with many openings, the openings being also referred to as grilleopenings.

The plurality of cross members 36 are disposed horizontally atpredetermined intervals, and the plurality of transverse members 37 aredisposed vertically at predetermined intervals. The interval between thecross members 36 adjacent to each other is, for example, equal to theinterval between the transverse members 37 adjacent to each other. Inaddition, the cross members 36 are perpendicular to the transversemembers 37, thereby forming a grille with many square openings.Meanwhile, in the embodiment of the present invention, the intervalbetween the cross members 36 adjacent to each other may be differentfrom the interval between the transverse members 37 adjacent to eachother. An angle of intersection between the cross member 36 and thetransverse member 37 is not limited only to the example shown in thedrawings.

The frame member 38 is disposed around the plurality of cross members 36and the plurality of transverse members 37 to enclose the cross members36 and the transverse members 37. That is, the frame member 38 connectsbetween end portions of the cross members 36 and between end portions ofthe transverse members 37. In particular, the frame member 38 includesan inner peripheral portion 39 and an outer peripheral portion 40. Theinner peripheral portion 39 includes a front portion, a rear portion, anupper portion, and a lower portion, and has a rectangular shape whenseen from the inner side or the outer side. The front ends of the crossmembers 36 are connected to the front portion of the inner peripheralportion 39. The rear ends of the cross members 36 are connected to therear portion of the inner peripheral portion 39. The upper ends of thetransverse members 37 are connected to the upper portion of the innerperipheral portion 39. The lower ends of the transverse members 37 areconnected to the lower portion of the inner peripheral portion 39.

The outer peripheral portion 40 has a rectangular shape when seen fromthe inner side or the outer side, and is disposed around the innerperipheral portion 39 to enclose the inner peripheral portion 39. Theouter peripheral portion 40 includes a front plate portion 40F, a rearplate portion 40R, an upper plate portion 40U, and lower plate portion40D. The front plate portion 40F is positioned in front of the innerperipheral portion 39. The rear plate portion 40R is positioned in backof the inner peripheral portion 39. The upper plate portion 40U ispositioned above the inner peripheral portion 39. The lower plateportion 40D is positioned under the inner peripheral portion 39. Thefront plate portion 40F is positioned apart from the rear plate portion40R. The upper plate portion 40U joints between an upper portion of thefront plate portion 40F and an upper portion of the rear plate portion40R with each other. The lower plate portion 40D joints between a lowerportion of the front plate portion 40F and a lower portion of the rearplate portion 40R with each other.

The front plate portion 40F, the rear plate portion 40R, the upper plateportion 40U, and the lower plate portion 40D each include an outer rimportion 42. The outer rim portion 42 is constituted of protrusionsprojecting toward the operator seat 8 (toward the inner side) from eachof the front plate portion 40F, the rear plate portion 40R, the upperplate portion 40U, and the lower plate portion 40D. In addition, thefront plate portion 40F, the rear plate portion 40R, the upper plateportion 40U, and the lower plate portion 40D each include an inner rimportion 43. The inner rim portion 43 is constituted of protrusionsprojecting toward the operator seat 8 (toward the inner side) from eachof the front plate portion 40F, the rear plate portion 40R, the upperplate portion 40U, and the lower plate portion 40D. End portion (on aninner side) of the inner rim portion 43 reaches the inner peripheralportion 39, and thus the inner rim portion 43 and the inner peripheralportion 39 form the concave portion 35.

As shown in FIG. 7, the grille includes a guide portion (a guide frame)47, the grille being formed in the side panel 31. The glass panel 34includes a window panel 45 having a projecting member 46. The guideportion 47 guides movement of the projecting member 46 of the windowpanel 45 disposed on the glass panel 34. In particular, the guideportion 47 enables the window panel 45 to move forward and backwardtogether with the projecting member 46, and provides a function to limit(restrict) a moving distance of the window panel 45. Detailedconfigurations of the glass panel 34 will be described below.

The guide portion 47 is formed of a portion surrounded by: twotransverse members 37 not adjacent to each other; and two cross members36 adjacent to each other. The cross members 36 adjacent to each otherare positioned apart from each other only at a distance corresponding toone grille opening. On the other hand, the transverse members 37 notadjacent to each other are positioned apart from each other at adistance corresponding to a plurality of the grille openings (sevengrille openings in the drawings).

The projecting member 46 contacts and slides on the cross members 36 ofthe guide portion 47 when the window panel 45 is being opened andclosed. For this reason, it is preferred to make the cross members 36 bethicker in a portion contacting the projecting member 46 than in therest portion not contacting the projecting member 46 as shown in FIG. 4and FIG. 5. In addition, the projecting member 46 contacts thetransverse members 37 of the guide portion 47 when the window panel 45is being opened and closed. For this reason, it is preferred to make thetransverse members 37 be thicker in a portion contacting the projectingmember 46 than in the rest portion not contacting the projecting member46, not shown in the drawings.

The guide portion 47 is disposed on a position corresponding to a rearportion of the side panel 31, and forms a long opening that is elongatedalong the front to rear direction (or the rear to front direction) andhas a rectangular shape. The guide portion 47 can be formed, forexample, by cutting off some of the transverse members 37 adjacent alongthe front to rear direction (or the rear to front direction), from amongthe plurality of transverse members 37 and the plurality of crossmembers 36 each constituting the grille, only by a length (a height) ofthe grille opening (hereinafter referred to as a unit length (or a unitheight)).

The side panel 31 has a reinforcement member, the reinforcement memberbeing a portion reinforced to increase stiffness of the side panel 31.The reinforcement member includes a first reinforcement portion 48.

The first reinforcement portion 48 is formed in the transverse member37. For details, as shown in FIG. 3 to FIG. 5, the first reinforcementportion 48 is formed by deforming the transverse member 37 to bepartially projected toward the side opposite to the operator seat 8(toward the outer side). For further details, the first reinforcementportion 48 is formed by deforming a portion of the transverse member 37to be projected, the portion being between the cross members 36 adjacentto each other. The projection of the first reinforcement portion 48 hasa V-shape in the example shown in the drawings, and may have a U-shapeor a W-shape. The first reinforcement portion 48 may be formed in allthe transverse members 37 in the unit lengths identical to each other(or the unit heights identical to each other), and may be formed in someof the transverse members 37. For example, the first reinforcementportion 48 may be formed in portions of the plurality of transversemembers 37, the portions being between the second cross member 36 fromthe upper portion and the third cross members 36. For another example,the first reinforcement portion 48 may be formed in portions of theplurality of transverse members 37, the portions being between the forthcross member 36 from the upper portion and the fifth cross members 36.That is, the first reinforcement portion 48 may be formed in portions ofthe plurality of transverse members 37, the portions being between thei-th cross member 36 from the upper portion and the (i+1)-th crossmembers 36. Meanwhile, the symbol [i] means the number of the crossmembers 36, and the symbol [i] is natural number, that is, 1, 2, 3, andso on.

In the above-mentioned description, the first reinforcement portion 48is disposed on the transverse member 37 in the example shown in thedrawings. However, the first reinforcement portion 48 may be disposed onthe cross members 36 and on both of the transverse members 37 and thecross members 36.

The side panel 31 includes the first reinforcement portion 48 describedabove. Thus, the first reinforcement portion 48 provides a function tosuppress deformation of the cross members 36 or the transverse members37 each forming the grille. In this manner, the stiffness of the sidepanel 31 is improved, and the side panel 31 can be prevented fromdeforming accordingly.

The side panel 31 having the above-mentioned configurations can bemanufactured by processing a metal plate.

The manufacturing of the side panel 31 includes a first process, asecond process, and a third process. The first process prepares a metalplate, and forms openings in the prepared metal plate (a flat plate)through a process for forming openings, thereby forming the grille. Thatis, the first process forms the grille in the metal plate.

A laser processing, a punch press processing, and other processingmethods may be employed as the process for forming the openings.

The second process presses the plate having the grille, using a pressforming process, to form the first reinforcement portion 48. The thirdprocess presses the plate, using the press forming process, to form theconcave portion 35 and the outer rim portion 42, the plate alreadyhaving the grille and the first reinforcement portion 48.

The side panel 31 is finished by other necessary process as needed afterthe above-mentioned first process to second process.

The above-mentioned manufacturing method is different from aconventional method for manufacturing a side panel. The conventionalmethod firstly deforms a plate through a press forming process, and thenperforms a process for forming openings in the pressed plate, therebyforming a grille. In addition, another conventional method, that is alsoa conventional method for manufacturing a side panel, firstly formsopenings in a flat panel to form a grille, and then integrally assemblesthe flat panel having the grille on a frame deformed by a press formingprocess, using a welding process or a bolt fastening process. However,the former conventional method has to perform the laser processing morethan once using a three-dimensional laser because the process forforming openings is performed on the deformed plate, and the latterconventional method has to perform the welding process or the boltfastening process in addition to the process for forming openings andthe press forming process. Both of the conventional methods require manyprocesses accordingly. A possible method firstly forms openings in aflat plate to form a grille plate, and then presses the grille plate toform a concave portion and a frame portion at the same time. The methodcan be considered as a method for reducing the number of processes.However, when the grille plate is pressed to be deformed, the grilleplate will be cracked and undulate because of the low stiffness of thegrille plate.

On the contrary, the method according to the embodiment of the presentinvention firstly forms openings in a flat plate to form a grille, andthen forms the first reinforcement portion 48 on the flat plate havingthe grille, using the press forming process. Then, the method is capableof manufacturing the side panel 31 by only performing the press formingprocess on the plate having the grille and the first reinforcementportions 48.

In addition, the side panel 31 is provided with the improved highstiffness due to the first reinforcement portion 48 formed by using thepress forming process, thereby being hard to be deformed. Thus, the sidepanel 31 is prevented from being cracked and undulating.

The cabin 3 can be manufactured by assembling the roof 30, the frontpanel 32, the rear panel 33, the glass panel 34, the operator seat 8,and the like with the side panel 31 manufactured in the above-mentionedmanner.

Then, a concrete configuration of the glass panel 34 will be describedbelow.

As shown in FIG. 1 to FIG. 3, FIG. 5, and FIG. 6, the glass panel 34 issecured by a frame 50 at a circumferential portion of the glass panel34, and is fitted to the concave portion 35 of the side panel 31together with the frame 50.

A window frame 51 is disposed on the side (the inner side) of the glasspanel 34, the inner side being an identical side to the operator seat 8(the side identical to the inside of the cabin 3).

As shown in FIG. 7, the window frame 51 includes an upper frame portion52, a lower frame portion 53, and a front frame portion 54. The upperframe portion 52 is extended along the front to rear direction (or therear to front direction) at a position near the upper rim portion of theframe 50. The lower frame portion 53 is extended along the front to reardirection (or the rear to front direction) at an approximatelyintermediate position between the upper rim portion and the lower rimportion of the frame 50. The front frame portion 54 is verticallyextended to connect between a front end portion of the upper frameportion 52 and a front end portion of the lower frame portion 53.

The window panel 45 is formed of a glass plate. The window panel 45 isfitted to the window frame 51. The window panel 45 is capable of moving(sliding) forward and backward along the upper frame portion 52 and thelower frame portion 53 of the window frame 51.

The glass panel 34 includes a circular rim 55 in a front portion of thewindow frame 51, the rim 55 forming an opening. The window panel 45moves (slides) forward within the window frame 51, thereby closing theopening formed by the rim 55, and moves (slides) backward within thewindow frame 51, thereby releasing the opening.

As shown in FIG. 7 to FIG. 9, the window panel 45 is provided with theprojecting member 46. The projecting member 46 is disposed on the side(the inner side) of the window panel 45, the inner side being anidentical side to the operator seat 8 (the side identical to the insideof the cabin 3), that is, on the window panel 45. The projecting member46 is inserted to the guide portion 47 and is capable of moving(sliding) between a front end and a rear end of the guide portion 47 inaccordance with the forward and backward moving (sliding) of the windowpanel 45.

As described above, the projecting member 46 is disposed on a rearportion of the window panel 45, the projecting member 46 being insertedto the guide portion 47. The guide portion 47 is disposed on a rearportion of the side panel 31. In addition, the opening formed by the rim55 is disposed on a front portion of the window frame 51. As shown inFIG. 9, even when the window panel 45 is moved (slid) backward torelease the opening, the guide portion 47 is not communicated with anoutside of the cabin 3 through the opening. That is, even when thewindow panel 45 is moved (slid) backward to release the opening, theguide portion 47 can be separated from the outside of the cabin 3 by aportion (a rear portion) of the glass panel 34, the rear portion nothaving the opening of the glass panel 34. In other words, a position ofthe rim 55 forming the opening does not correspond to a position of theguide portion 47, and is different from the position of the guideportion 47 in the front to rear direction (or the rear to frontdirection). The rim 55 is opposite to the grille of the side panel 31,that is, the rim 55 faces a portion forming the grille.

As described above, the inside of the cabin 3 is communicated with theoutside of the cabin 3 when the opening is released. However, the grilleof the side panel 31 is capable of protecting the side of the operatorseat 8 regardless of the communication. In addition, since the glasspanel 34 is arranged on an outside of the side panel 31 (the sideopposite to the operator seat 8), the glass panel 34 can be easilyattached, detached, and cleaned from the outside of the cabin 3. Inother words, the grille of the side panel 31 does not interfere theattachment, the detachment, and the cleaning of the glass panel 34. FIG.9 shows a portion of the grille, the portion being surrounded by anoval, by excluding the rest portion of the grille (the outside of theoval), thereby clearly showing the window panel 45, the window frame 51,and the rim 55.

FIG. 11 shows a back surface of the front panel 32. As shown in FIG. 11,the front panel 32 includes a panel frame 102 and a panel plate 103.

The panel frame 102 includes an upper frame portion 104, a right frameportion 105, a left frame portion 106, and a lower frame portion 107.The panel frame 102 is formed to be a substantially-quadrangular frame.The upper frame portion 104 is arranged on an upper side of the panelframe 102. The right frame portion 105 is arranged on a right side ofthe panel frame 102. The left frame portion 106 is arranged on a leftside of the panel frame 102. The lower frame portion 107 is arranged ona lower side of the panel frame 102. An opening 108 is surrounded by andformed of the upper frame portion 104, the right frame portion 105, theleft frame portion 106, and the lower frame portion 107. A seal member109 is firmly fixed on a lower surface of the lower frame portion 107.

The panel plate 103 is constituted of a transparent glass plate. Thepanel plate 103 is fixed on a front surface of the panel frame 102 andcloses the opening 108 of the panel frame 102.

As shown in FIG. 10 and FIG. 12, the cabin 3 includes a frame member 74,the frame member 74 (hereinafter referred to as the entrance frame 74)forming an opening 101 for getting on and off (hereinafter referred toas an entrance opening 101). The entrance frame 74 includes an upperframe portion 75, a lower frame portion 76, a left frame portion 77, anda right frame portion 78. The upper frame portion 75 extends downwardfrom a front end portion of the roof 30 and is positioned on or above anupper portion of the front panel 32. The lower frame portion 76 isopposite to the upper frame portion 75 and is positioned on or under alower portion of the front panel 32. The left frame portion 77 ispositioned on or beside a left portion of the front panel 32, the leftportion being the outer rim portion 42 disposed on a front side of theleft side panel 31. The right frame portion 78 is positioned on orbeside a right portion of the front panel 32, the right portion beingthe outer rim portion 42 disposed on a front side of the right sidepanel 31. The upper frame portion 75, the lower frame portion 76, theleft frame portion 77, and the right frame portion 78 are provided witha seal member 56 or the seal member 109.

The front panel 32 is in contact with the seal member 56 from behind(from an inside of the cabin 3), thereby closing the entrance opening101.

As shown in FIG. 12, the front panel 32 is capable of being moved to aclosing position S1 (a first position) where the front panel 32 closesthe entrance opening 101 as shown by a solid line in FIG. 12 and to ahousing position S2 (a second position) where the front panel 32 ishoused between the operator seat 8 and the roof 30 as shown by a two-dotchain line in FIG. 12, and thus the front panel 32 is capable of beingfreely moved between the closing position S1 and the housing positionS2. The entrance opening 101 is opened when the front panel 32 is movedto the housing position S2.

In addition, a pair of strikers (first strikers) 110 are disposed on aback surface of the upper frame portion 75 of the entrance frame 74 (ona surface facing the inside of the cabin 3) as shown in FIG. 12. One ofthe first strikers 110 is disposed on a left side of the back surface,and the other one of the first strikers 110 is disposed on a right sideof the back surface. Each of the first strikers 110 is fixed tocorresponding one of brackets 111, the brackets 111 being disposed onthe upper frame portion 75 of the entrance frame 74. Each of the firststrikers 110 project downward from the corresponding bracket 111.

In addition, a pair of strikers (second strikers) 112 are disposed on arear portion of the roof 30, that is, behind the operator seat 8 andunder the roof 30. One of the second strikers 112 is disposed on a leftside of the rear portion of the roof 30, and the other one of the secondstrikers 112 is disposed on a right side of the rear portion of the roof30. Each of the second strikers 112 is fixed to corresponding one ofbrackets 113, the brackets 113 being disposed on a side closer to alower surface of the roof 30.

A pair of latches 114 are disposed on an upper surface 104 a of theupper frame portion 104 of the front panel 32, that is, on a rim layingunder the first strikers 110 when the front panel 32 is moved to thefirst position S1 (portions corresponding to the first strikers 110 whenthe front panel 32 is moved to the first position S1). One of thelatches 114 is disposed on a left side of the upper surface 104 a, andthe other one of the latches 114 is disposed on a right side of theupper surface 104 a. Each of the latches 114 is capable of being engagedto the corresponding strikers 110 and 112.

Each of the latches 114 is capable of being engaged to the correspondingfirst striker 110 under a state where the front panel 32 is moved to theclosing position S1. And, each of the latches 114 is capable of beingengaged to the corresponding second striker 112 under a state where thefront panel 32 is moved to the housing position S2.

In addition, the latch 114 disposed on the right side is capable ofbeing engaged to the strikers 110 and 112 disposed on the right side,and the latch 114 disposed on the left side is capable of being engagedto the strikers 110 and 112 disposed on the left side. In addition, thefront panel 32 is held at the closing position S1 when the latch 114 isengaged to the first striker 110, and the front panel 32 is held at thehousing position S2 when the latch 114 is engaged to the second striker112. The front panel 32 becomes repositionable (becomes capable of beingfreely moved) when the engagement between the latch 114 and the striker110 or 112 is released.

Meanwhile, at least one grip or finger grip (not shown in the drawings)is disposed on an inner side of the front panel 32 (inside the cabin 3),the grip or the finger grip being grasped or pinched for the move(reposition) of the front panel 32.

As shown in FIG. 13, the latch 114 includes an engagement plate 116 anda lock plate 117. The engagement plate 116 is engaged to the strikers110 and 112. The lock plate 117 holds the engagement between theengagement plate 116 and the strikers 110 and 112. FIG. 13 shows thelatch 114 disposed on the right side of the front panel 32.

The engagement plate 116 is supported on a first bracket 118 by a firstpivot shaft 119 to be capable of freely turning, the first bracket 118being fixed to the upper frame portion 104 of the panel frame 102. Thelock plate 117 is supported on a second bracket 120 by a second pivotshaft 121 to be capable of freely turning, the second bracket 120 beingfixed to the upper frame portion 104 of the panel frame 102.

The engagement plate 116 is pressed by a spring 122 toward a directionshown by an arrowed line X1, the spring 122 being formed of a twistedcoil spring. The lock plate 117 is pressed by a spring 123 toward adirection shown by an arrowed line X2, the spring 123 being formed of atwisted coil spring. The engagement plate 116 is provided with anengagement concave portion 124. An engagement portion 125 is formed inthe lock plate 117, the engagement portion 125 being configured toengage to the engagement concave portion 124.

The turn of the engagement plate 116 is restricted in the directionshown by the arrowed line X1 when the engagement portion 125 is engagedto the engagement concave portion 124 under a state where the engagementplate 116 is engaged to the strikers 110 and 112. In this manner, therestriction keeps the engagement between the engagement plate 116 andthe strikers 110 and 112.

The lock plate 117 is provided with a connecting portion 128, theconnecting portion 128 being connected to an inner wire 127 of a Bowdenwire (a Bowden cable) 126. The inner wire 127 of the Bowden wire 126 isconnected to a handle tool 129 (refer to FIG. 11) disposed on a backsurface of a lower portion of the front panel 32 (inside the cabin 3),thereby moving in synchronization with the handle tool 129.

The engagement portion 125 is separated from the engagement concaveportion 124 when the Bowden wire 126 is operated by the handle tool 129to pull the connecting portion 128 of the lock plate 117 toward thedirection shown by an arrowed line Y. The engagement plate 116 becomescapable of turning toward the direction shown by the arrowed line X1when the engagement portion 125 is separated from the engagement concaveportion 124, and thereby the engagement plate 116 can separate from thestrikers 110 and 112.

In addition, as shown in FIG. 10, a grip (a handle grip) 130 is disposedon the front panel 32. The grip 130 is disposed on a front surface ofthe lower portion of the front panel 32 (outside the cabin 3). The frontpanel 32 can be handled from the outside with the grasp of the grip 130.The grip 130 is provided with a release portion 131. The release portion131 is capable of being manipulated (pushed). The manipulation (pushing)of the release portion 131 can operate the Borden wire 126.

As shown in FIG. 12, a guide rail 132 is disposed on the front portionof each of the side panels 31. The guide rail 132 is disposed, from anupper portion of the side panel 31 to the lower portion, on the sidepanel 31. In addition, as shown in FIG. 8 and FIG. 9, the guide rail 132is fixed to an attachment plate 133 attached on the side panel 31.

As shown in FIG. 11, a roller 134 is disposed on each of a right sideand a left side of a lower end of the front panel 32. The roller 134disposed on the right side is engaged to the guide rail 132 disposed onthe right side. The roller 134 disposed on the left side is engaged tothe guide rail 132 disposed on the left side. Each of the rollers 134 iscapable of moving along a longitudinal direction of the guide rail 132.

In addition, a support device 135 is disposed on an upper portion of thefront portion of each of the side panels 31, the support device 135being configured to support the front panel 32.

The support device 135 includes a swing link 136 and a gas spring 137.

The swing link 136 is pivotally supported on a bracket 138 by an upperpivot shaft 139 at one end (an upper portion) of the swing link 136, thebracket 138 being fixed to the roof 30. And, the swing link 136 ispivotally supported on a bracket 140 by a lower pivot shaft 141 at theother end (a lower portion) of the swing link 136, the bracket 140 beingfixed to a side frame portion of the panel frame 102.

The gas spring 137 is pivotally supported on an upper portion of theswing link 136 at one end (an upper portion) of the gas spring 137. Thegas spring 137 is pivotally supported on a bracket 142 at the other end(a lower portion) of the gas spring 137, the bracket 142 being fixed tothe guide rail 132.

Considering the front panel 32 moving from the closing position S1 tothe housing position S2, the engagement between the first striker 110and the latch 114 is released at first, then the front panel 32 is movedfrom the closing position S1, shifting an upper portion of the frontpanel 32 backward. Then, the roller 134 moves from the lower portion ofthe guide rail 132 to the upper portion, and thus the lower portion ofthe front panel 32 moves upward. In this manner, the front panel 32 ispositioned at a pre-housing position S3 under the housing position S2 asshown by the two-dot chain line in FIG. 12.

In the move of the front panel 32 from the closing position S1 to thehousing position S3, the lower portion of the swing link 136 swingsbackward about the upper pivot shaft 139 with the move of the frontpanel 32. The above-described swing link 136 supports the front panel32, allowing the move of the front panel 32. In addition, the gas spring137 stretches to provide a rotational force to the swing link 136, therotational force being applied backwardly upward (upwardly backward),thereby helping the move of the front panel 32.

Then, the front panel 32 is moved upward after the front panel 32 ismoved to the pre-housing position S3, and thereby the front panel 32 ispositioned at the housing position S2 and the latch 114 is engaged tothe second striker 112.

In the following descriptions, a direction along a width of the frontpanel 32 is referred to as a panel width direction, the panel widthdirection being a direction shown by an arrowed line W in FIG. 14 andFIG. 15. In addition, a direction from a center of the width of thefront panel 32 toward an end of the width of the front panel 32 isreferred to as an outward panel width direction, the outward panel widthdirection being a direction shown by an arrowed line W1 in FIG. 11, FIG.14, and FIG. 15. Moreover, a direction from the end of the width of thefront panel 32 toward the center of the width of the front panel 32 isreferred to as an inward panel width direction, the inward panel widthdirection being a direction shown by an arrowed line W2 in FIG. 11, FIG.14, and FIG. 15.

As shown in FIG. 11, a pair of lock devices 143 is disposed on the lowerportion of the front panel 32.

As shown in FIG. 14 and FIG. 15, the lock device 143 includes a lockmember 144, a support member 145, and a pressing member 146, the supportmember 145 supports the lock member 144. The pressing member 146 pressesthe lock member 144. FIG. 14 and FIG. 15 show the lock device 143disposed on the left side.

The lock member 144 is constituted of a pin, the pin having an axisextending along the panel width direction W. The lock member 144 isprovided with a manipulation knob 147 and an engagement member 148, themanipulation knob 147 being for manipulating the lock member 144, theengagement member 148 being for positioning the lock member 144.

The lock member 144 includes a large diameter portion 149 and a smalldiameter portion 150. The large diameter portion 149 has a cylindricalshape. The small diameter portion 150 has a cylindrical shape having adiameter smaller than that of the large diameter portion 149.

The lock member 144 includes a portion serving as the large diameterportion 149, the portion being inwardly in the inward panel widthdirection W2. The lock member 144 includes a portion serving as thesmall diameter portion 149, the portion being outwardly in the outwardpanel width direction W1. The manipulation knob 147 and the engagementmember 148 are disposed on the large diameter portion 149. Themanipulation knob 147 is disposed inwardly in the inward panel widthdirection W2 than the engagement member 148.

The support member 145 includes an attachment plate 151 and a guidemember 152.

The attachment panel 151 is attached to a fixation member 153, thefixation member 153 being fixed to a panel frame 102.

One of the fixation members 153 is fixed to both of: a lower end portionof the side frame portion 105 of the panel frame 102; and an end portionof the lower frame portion 107 in the panel width direction W. The otherone of the fixation members 153 is fixed to both of: a lower end portionof the side frame portion 106 of the panel frame 102; and an end portionof the lower frame portion 107 in the panel width direction W. A supportbracket 154 is attached to the fixation member 153, the support bracket154 being configured to support the roller 134.

The attachment plate 151 includes a first plate portion 155 and a secondplate portion 156. The first plate portion 155 is put on a back surfaceof the fixation member 153 to be overwrapped with the back surface, andis fixed to the fixation member 153 by bolts. The second plate portion156 protrudes backward from an end portion of the first plate portion155, the end portion being disposed in the outward panel width directionW1. A pin insertion hole 157 is formed in the second plate portion 156.

The guide member 152 is formed of a member extending along the panelwidth direction W, having a U-shape when seen from the side of the guidemember 152. The guide member 152 is fixed to the first plate portion155, the first plate portion 155 closing an opening side of the guidemember 152 arranged on the first plate portion 155. The lock member 144is inserted to the guide member 152. The small diameter portion 150 ofthe lock member 144 is inserted to the pin insertion hole 157, and moves(slides) in the pin insertion hole 157 along the panel width directionW. The large diameter portion 149 of the lock member 144 protrudestoward the inward panel width direction W2 from the guide member 152.The manipulation knob 147 is disposed on the protruding portion.

A guide slit 158 is formed in the guide member 152. The guide slit 158is formed in the guide member 152 on a side being in the inward panelwidth direction W2. The engagement member 148 is disposed in the guideslit 158.

The guide slit 158 includes a first slit 159, a second slit 160, and athird slit 161.

The first slit 159 allows the engagement member 148 (the lock member144) to move (slide) within a predetermined length along the panel widthdirection W. The second slit 160 and the third slit 161 restrict themoving (sliding) of the engagement member 148 (the lock member 144) inthe panel width direction W.

The second slit 160 is formed on an end of the first slit 159 in theoutward panel width direction W1. The third slit 161 is formed on an endof the first slit 159 in the inward panel width direction W2.

The engagement member 148 can be moved (slid) from the first slit 159 tothe second slit 160 or from the first slit 159 to the third slit 161 byturning the lock member 144 about an axis of the lock member 144.

In the embodiment, the pressing member 146 is constituted of a coilspring, and is fitted externally to the small diameter portion 150. Oneend of the pressing member 146 contacts to the second plate portion 156.The other end of the pressing member 146 contacts to the large diameterportion 149. In this manner, a pressing force of the pressing member 146is applied to press the lock member 144 toward the inward panel widthdirection W2. Since the lock member 144 is pressed toward the inwardpanel width direction W2, the lock member 144 is held at a positionwhere the small diameter portion 150 of the lock member 144 does notprotrude so much.

The pressing member 146 contacts to the second plate portion 156, andthe second plate portion 156 includes a portion contacting to thepressing member 146 as a first receiving portion 162. The pressingmember 146 contacts to the large diameter portion 149, and the largediameter portion 149 includes a portion contacting to the pressingmember 146 as a second receiving portion 163.

As shown in FIG. 12, a holding member 164 is disposed on an upperportion of the front portion of each of the side panels 31. The holdingmember 164 is fixed to the attachment plate 133 as shown in FIG. 9.

The holding member 164 is formed of a cylindrical member, thecylindrical member having an axis extending along the panel widthdirection W.

As shown in FIG. 15, the holding member 164 and the lock member 144 arepositioned corresponding to each other in the panel width direction W,that is, being opposite to each other, when the front panel 32 ispositioned at the housing position S2.

Accordingly, after the front panel 32 is positioned at the housingposition S2, the small diameter portion 150 protrudes much from thesecond plate portion 156 when the lock member 144 is moved (slid) towardthe outward panel width direction W1 against the pressing force of thepressing member 146.

After the small diameter portion 150 is engaged (inserted) to theholding member 164, the lock member 144 is restricted from moving(sliding) backward from the holding member 164 when the engagementmember 148 is positioned at (moved to) the second slit 160 by turningthe lock member 144 about the axis of the lock member 144. In thismanner, the small diameter portion 150 is inserted to the holding member164 to be held by the holding member 164.

A side of the front panel 32 can be held at the housing position S2, theside being opposite to the side having the latch 114 of the front panel32, when the small diameter portion 150 is inserted to the holdingmember 164 to be held by the holding member 164.

In the above-mentioned configurations, the front panel 32 moves betweenthe closing position S1 and the housing position S2 under a state wherethe lock member 144 is separated (released) from the holding member 164.The lock member 144 is pressed toward the inward panel width directionW2 by the pressing member 146 in the move of the front panel 32, theinward panel width direction W2 being opposite to a direction of theinsertion to the holding member 164, and thereby the lock member 144scarcely protrudes from the front panel 32 toward the outward panelwidth direction W1. As described above, the lock member 144 scarcelyprotrudes from the front panel 32 toward the outward panel widthdirection W1 in moving the front panel 32 between the closing positionS1 and the housing position S2. Accordingly, the lock member 144 can beprevented from hitting something (for example, the gas spring 137),thereby preventing the front panel 32 from being hard to be moved.

In addition, the latch 114 disposed on the front panel 32 is engaged tothe first striker 110 at the closing position S1, the first striker 110protruding downward, and is engaged to the second striker 112 at thehousing position S2, the second striker 112 protruding forward. Thus,movement (shake and vibration) of the front panel 32 can be suppressedat both of the closing position S1 and the housing position S2 in thepanel width direction W.

Meanwhile, the pressing member 146 is not necessarily limited to a coilspring, and may be other spring members.

As shown in FIG. 8 an operation member 60 (an operation device 60) isdisposed inside the cabin 3. The operation member 60 is a device foroperating the devices provided on the slid steer loader 1. The operationmember 60 is disposed on a corner portion (an interior angle portion)between: the right frame portion 78 of the entrance frame 74; and asurface of the right side panel 31, the surface facing the operator seat8. For details, the right side panel 31 has a hollow 61 between theinner rim portion 43 of the front plate portion 40F and the right frameportion 78. The operation member 60 is attached to an attachment plate57, the attachment plate 57 being arranged in the hollow 61. In thismanner, the operation member 60 does not protrude to the inside of thecabin 3, and accordingly a space of the cabin 3 can be utilizedefficiently. Meanwhile, the operation member 60 may be disposed on acorner portion (an interior angle portion) between: the left frameportion 77; and a surface of the left side panel 31, the surfacepositioning on a side left to the operator seat 8.

The operation member 60 includes a plurality of switches. The switchesserve as switches for operating a plurality of devices included in theskid steer loader 1. The switches can operate, for example, a wiper, ahead lamp, and a cylinder lock. The switches are not limited to theabove-mentioned switches. The plurality of switches are arranged inparallel with each other along the vertical direction. In this manner,the operation member 60 has a vertically-long and horizontally-shortshape, that is, a vertically-elongated shape, thereby being easilyhoused in the hollow 61.

The operation member 60 is disposed closer to a lower portion of thecabin 3, concretely, the operation member 60 is disposed under a half ofthe whole height of the cabin 3. In this manner, an operator can easilyaccess the operation member 60, sitting on the operator seat 8. Theoperator can operate the switches without hanging out of the operatorseat 8 accordingly, and thus the operation member 60 according to theembodiment provides good operability.

In addition, since the operation member 60 is disposed closer to thelower portion of the cabin 3, a space can be easily created closer tothe upper portion of the cabin 3, the space being used for arranging theabove-mentioned members (the first striker 110, the bracket 111, and thesupport device 135) each for opening the front panel 32.

Moreover, the operation member 60 is arranged to orient a surface of theoperation member 60 backward and diagonally-leftward, the surface havingthe above-mentioned switches. The surface having the switches is facedtoward an operator sitting on the operator seat 8, and thus theoperation member 60 according to the embodiment provides goodoperability. Meanwhile, considering a case where the operation member 60is disposed on the above-mentioned left corner portion between the leftframe portion 77 and the left side panel, the operation member 60 isdisposed orienting the surface backward and diagonally-rightward, thesurface having the switches.

Then, an air conditioner (not shown in the drawings) is disposed insidethe cabin 3, the air conditioner being configured to condition thetemperature in the cabin 3. As shown in FIG. 18 and FIG. 20, a circular(looped) rim 65 is formed on the outer peripheral portion 40 of the sidepanel 31, the circular rim 65 forming an opening (an external air inlet)for taking an external air to supply the taken air to the airconditioner. The rim 65 is formed, on an upper portion of the outerperipheral portion 40, closer to a rear portion of the side panel 31.For details, the rim 65 is disposed on a rear portion of the upper plateportion 401) of the outer peripheral portion 40. In other words, the rim65 is positioned above a portion between the front wheel 5F and the rearwheel 5R of the skid steer loader 1.

Considering a case where the external air inlet of the air conditioner,that is, the rim 65 is disposed on or under a lower portion of the rearpanel of the cabin 3, the external air inlet tends to suck earth, sand,and dust when the air conditioner is in operation, the earth, sand, anddust being deposited on an engine hood (a bonnet) of the skid steerloader 1. In addition, considering a case where the external air inletis disposed on a side portion of the machine body 2, the external airinlet tends to suck earth and sand when the air conditioner is inoperation, the earth and sand being bounced by a running tire of theskid steer loader 1.

In contrast, according to the present invention, the external air inletis disposed, on the outer peripheral portion 40, closer to the rearportion of the side panel 31. In this manner, the external air inlet canbe prevented from sucking: the earth, sand, and dust deposited on theengine hood; or the earth and sand bounced by the running tire, when theair conditioner is in operation. However, in the scope of the presentinvention, a position of the external air inlet (the rim 65) of the airconditioner is not necessarily limited to the example shown in thedrawings. The external air inlet (the rim 65) may be disposed on theouter peripheral portion 40 at a position different from the exampleshown in the drawings.

A filter 66 is inserted to the external air inlet (the rim 65) of theair conditioner. In particular, a holding member 79 holds the filter 66by sandwiching the filter 66 at an upper surface and a lower surface ofthe filter 66. The holding member 79 is fitted to the rim 65 andinserted (embedded) into the external air inlet. The holding member 79has protruding portions 82, the protruding portions 82 protruding upwardor downward. A seal member 83 is attached to each of the protrudingportions 82.

As shown in FIG. 16 and FIG. 19, a cover 67 is disposed on an externalside (on a side opposite to the hollow (inside member) 61) of the filter66. The cover 67 includes a louver portion 68 and attachment portions69. The louver portion 68 covers the filter 66 and has a plurality ofair inlets (openings). The attachment portions 69 are attached to theouter peripheral portion 40, that is, to the upper plate portion 40U ofthe outer peripheral portion 40. As shown in FIG. 17 and FIG. 19, thelouver portion 68 includes: a plurality of air inlets 80; and aplurality of visor portions 81 each disposed on an outside (a sideopposite to the filter 66) of the corresponding air inlet 80, each ofthe visor portions 81 extending downward. In the example shown in FIG.17, the cover 67 has: the plurality of air inlets 80 (four air inlets 80in the drawing) arranged along the front to rear direction (or the rearto front direction) at predetermined intervals; and the plurality of airinlets 80 (three air inlets 80 in the drawing) arranged along thevertical direction at predetermined intervals. Each of the plurality ofvisor portions 81 is disposed on an outside of the corresponding airinlet 80.

One of the attachment portions 69 extends forward and is disposed infront of the louver portions 68, and the other one of the attachmentportions 69 extends backward and is disposed in rear of the louverportions 68. Each of the attachment portions 69 has a through hole. Ashaft portion of a knob bolt 70 is inserted to the through hole, theshaft portion is screwed to a female screw hole disposed on the upperplate portion 40U of the outer peripheral portion 40 of the side panel31, and thereby the cover 67 is fixed to the outer peripheral portion 40in a freely attachable and detachable manner.

As shown in FIG. 16 and FIG. 19, a shield member 71 is fixed externallyon an outside of the louver portions 68 (on a side opposite to the outerperipheral portion 40). The shield member 71 includes a plurality ofplates 72 (three plates 72 in the drawings) and a plurality of jointportions 73, the plates 72 extending along the front to rear direction(or the rear to front direction) and being arranged (disposed)vertically at predetermined intervals, the joint portions 73 eachjointing the plates 72.

As shown in FIG. 19, the plate 72 is disposed on the outside of thelouver portions 68 (on a side opposite to the filter 66) to form a spacebetween the louver portion 68 and the plate 72. Five of the jointportions 73 vertically extend and are arranged (disposed) along thefront to rear direction (or the rear to front direction) atpredetermined intervals. A fixation portion 84 is disposed on upper endsof the joint portions 73, the fixation portion 84 being fixed to thecover 67. The fixation portion 84 is fixed to an upper rim portion ofthe cover 67 by welding, and thereby the cover 67 and the shield member71 are integrally assembled.

Each of the plates 72 is arranged between the louver portions 68 beingvertically adjacent to each other. In particular, each of the plates 72is arranged between the visor portions 81 being vertically adjacent toeach other.

Since the louver portion 68 includes the visor portion 81 extendingdownward, the louver portion 68 provides a good feature to block watercoming from above (for example, rain water) so as to prevent the waterfrom reaching the filter 66, However, the louver portion 68 does notprovide sufficient feature to block water coming from below. The plates72 of the shield member 71 are arranged between the louver portions 68(specifically the visor portions 81) vertically adjacent to each other,thereby being capable of blocking the water coming from below. In thismanner, considering a case where the water is splashed from below towardthe cabin 3 by a hose in washing the skid steer loader 1, the water isprevented from entering into a duct 44. Accordingly, the filter 66 canbe prevented from deteriorating, and the air conditioner can beprevented from performance deterioration, the performance deteriorationbeing caused by the deterioration of the filter 66.

Meanwhile, as shown in FIG. 19 and FIG. 20, the air inlets 80 and thefilter 66 are communicated with the duct 44, the duct 44 being disposedon an inside of the side panel 31 (the inside facing the operator seat8). The outer peripheral portion 40 of the frame member 38 forms a partof the duct 44, the duct 44 being configured to take an external air tosupply the taken air to the air conditioner.

A configuration of the duct 44 will be described in detail below.

The duct 44 is constituted of the outer peripheral portion 40 and aninside member 62. The inside member 62 is a member attached to an insideof the frame member 38 (the inside facing the operator seat 8). Theouter peripheral portion 40 of the frame member 38 is fixed to theinside member 62 by welding, and the outer peripheral portion 40 and theinside member 62 are integrally assembled.

The inside member 62 includes a first plate portion 63 and a secondplate portion 64.

The first plate portion 63 is a plate member opposite to the upper plateportion 40U of the outer peripheral portion 40. The first plate portion63 is separated from the upper plate portion 40U toward the inside(inward), and the first plate portion 63 and the filter 66 are oppositeto each other. A rear end of the first plate portion 63 is fixed to theouter rim portion 42 of the rear plate portion 40R. An upper end of thefirst plate portion 63 is formed on a lower surface of the roof 30 or onthe outer rim portion 42 of the upper plate portion 40U.

The second plate portion 64 is opposite to the roof 30, is connected tothe first plate portion 63 at a side (an inner side) of one end of thesecond plate portion 64, and is connected at a side (an outer side) ofthe other end of the second plate portion 64. For details, the secondplate portion 64 extends toward the side panel 31 (the upper plateportion 40U of the outer peripheral portion 40) and extends downwardbeing parallel to the side panel 31 (the upper plate portion 40U of theouter peripheral portion 40). In this manner, the duct 44 for airpassage is formed of the first plate portion 63, the second plateportion 64, and the outer peripheral portion 40 (the upper plate portion40U and the outer rim portion 42).

According to the above-mentioned configurations, the outer rim portion42 of the upper plate portion 40U constitutes an upper wall of the duct44, the upper plate portion 40U constitutes an outer wall of the duct44, the first plate portion 63 of the inside member 62 constitutes aninner wall of the duct 44, and the second plate portion 64 of the innermember 62 constitutes a lower wall of the duct 44.

As described above, the outer peripheral portion 40 of the frame member38 of the side panel 31 is used for a part of the duct 44, and therebythe duct 44 can be formed only by attaching the inside member 62 to aninside of the outer peripheral portion 40. The duct 44 can be simplyformed of the small number of parts accordingly. In addition, the insidemember 62 is fixed to and integrally assembled to the outer peripheralportion 40, and thereby reinforcing the side panel 31 to improvestrength of the side panel 31, for example, bending strength.

Meanwhile, the inside member 62 may include a third plate portion 85 anda fourth plate portion 86. The third plate portion 85 is disposedbetween: a front end of the first plate portion 63; and the upper plateportion 40U. The third plate portion 85 is connected to the front end ofthe first plate portion 63 at one end (an inner side) of the third plateportion 85, and is connected to the upper plate portion 40U at the otherend (an outer side) of the third plate portion 85.

The fourth plate portion 86 is a plate member being opposite to the rearplate portion 40R of the outer peripheral portion 40 and to the upperplate portion 40U. In particular, one end (an upper side) of the fourthplate portion 86 is opposite to the upper plate portion 40U, and anintermediate portion of and the other end (a lower side) of the fourthplate portion 86 are opposite to the rear plate portion 40R. A rear endof the fourth plate portion 86 is connected to the outer rim portion 42of the rear plate portion 40R. Or, the rear end of the fourth plateportion 86 is disposed near (in the vicinity of) the outer rim portion42 of the rear plate portion 40R. In this manner, the rear plate portion40R, the outer rim portion 42 of the rear plate portion 40R, and thefourth plate portion 86 can constitute the duct 44 also on an inner sideof the rear plate portion 40R.

In the above description, the embodiment of the present invention hasbeen explained. However, all the features of the embodiment disclosed inthis application should be considered just as examples, and theembodiment does not restrict the present invention accordingly. A scopeof the present invention is shown not in the above-described embodimentbut in claims, and is intended to include all modifications within andequivalent to a scope of the claims.

What is claimed is:
 1. A cabin comprising: a panel disposed on a side ofan operator seat, the panel including: a plurality of cross membersextending in a first direction; a plurality of transverse membersintersecting with the plurality of cross members each other andextending in a second direction; and a frame member configured toconnect between end portions of the cross members and between endportions of the transverse members; a glass panel disposed on a side ofthe panel, the side being opposite to the operator seat; a window framedisposed on the glass panel; a window panel disposed on the windowframe, the window panel being configured to move in the first directionor in the second direction; a projecting member disposed on a side ofthe window panel, the side being an identical side to the operator seat,the projecting member being configured to move together with the windowpanel in the first direction or in the second direction; and a guideportion configured to accept insertion of the projecting member and tolimit a moving distance of the window panel, the guide portion beingconstituted of the cross members and the transverse members.
 2. Thecabin according to claim 1, wherein the window frame is disposed on aside of the glass panel, the side being an identical side to theoperator seat, the glass panel including: a rim forming an opening in afront portion of the window frame, and the window panel closes theopening by moving forward in the window frame, and opens the opening bymoving backward in the window frame.
 3. The cabin according to claim 1,wherein the guide portion is disposed on a position corresponding to arear portion of the panel.
 4. The cabin according to claim 1,comprising: a frame member forming an entrance opening, the frame memberbeing disposed in front of the operator seat; and an operation memberdisposed on a corner portion between the panel and the frame memberforming the entrance opening.
 5. A cabin comprising: a panel disposed ona side of an operator seat, the panel including: a plurality of crossmembers extending in a first direction; a plurality of transversemembers intersecting with the plurality of cross members each other andextending in a second direction; and a frame member configured toconnect between end portions of the cross members and between endportions of the transverse members: a glass panel disposed on a side ofthe panel, the side being opposite to the operator seat; a window framedisposed on the glass panel; a window panel configured to move along theglass panel; a projecting member disposed on a side of the window panel,the side being an identical side to the operator seat, the projectingmember being configured to move together with the window panel; and aguide portion configured to accept insertion of the projecting memberand to limit a moving distance of the window panel.
 6. The cabinaccording to claim 5, wherein the window frame is disposed on a side ofthe glass panel, the side being an identical side to the operator seat,the glass panel including: a rim forming an opening in a front portionof the window frame, and the window panel closes the opening by movingforward in the window frame, and opens the opening by moving backward inthe window frame.
 7. The cabin according to claim 5, wherein the guideportion is disposed on a position corresponding to a rear portion of thepanel.
 8. A working machine comprising: the cabin according to claim 1;an operation device including: a boom configured to freely swing upwardand downward; and an operation tool supported on a front portion of theboom; and a travel device.